You are running an experiment to test whether having high impulsivity increases the likelihood of gambling, even in high risk situations. You have participants complete a standardised measure of impulsivity and split the participants into high and low impulsive groups based on this score. You randomly assign the members of each of the groups to either high stakes gambling (real money) or low stakes gambling (fake money) and measure the difference in how much each group gambles.

What type of variable would each of the following variables in this study be?

Impulsivity /risk level /gambling behaviour